86

Frank

What is angle of a surface rising 14 ft in yards?

120 [x] 3 [=] 360

1400 108

320 [-] 288 [=] 32

388 = 0388

between 2° 13' & 2° 14'

87

Frank)

Big Chalk Valley

If 1 lb 13 1/2 oz were accumulated during 45 days, how much would accumulate during 182 days (1/2 year); & having worked this out, how much per acre during the working half of the year.

Ton 16.111 per acre in 182 days

[calculations]

4840 sqr yards in acre

88

twice weight of disintegrated casting from 71 gr food

270 grams = 9.52 ounces

9.52 [x] 9 [=] 85.68 [÷] 9 [=] 952

also multiply by 9 from square yard 9.52 x 9 = 85.68

Collected on same spot after interval of 4 months 1096 gr or 71 grams = 2.5003

(reduce to oz)

lb 8568000 (5.57

88

5.7

2.5 [x] 9 [=] 22.5 [÷] 10 [-] 16 [=] 6 oz (1.65

[on verso: Draft of Cross and self fertilization, p. 147]

89

29 1/2 oz ejected on square yard in 40 years

I assume the worms work for 1/2 year

[calculations]

Great Valley Calcareous castings

[calculations]

Amount ejected on square yard during 6 months (3)

Multiply (3) by 4840 sq yards in acre & reduce to tons & Pounds

40593.08 pounds per acre = 18.12 tons = 18 tons 27 pounds